Trigonometry PYQ From JEE Main 2023 | Important PYQ

JEE Mains 2023, PYQ From Trigonometry

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[ajay]

No need for the value of sin 18 and cos 36
2( 1/sin18 - 1/sin54)
= 2( sin54 - sin 18)/ sin 18. Sin54
= 4 cos 36. Sin 18/ sin 18. Sin 54
= 4.... ( Cos 36= sin 54 and they get cancelled)

[ShouriAKBhat]

actually all of those are the roots of tan(5x)=1, just one must add tan(pi/4) then we expand tan(5x), and then get sum total is 5 but if we add tanpi/4 then subtract so 4

[IITiann]

No need of
Tan 81 = 1/tan9
Tan 54=1/tan 27

....


Tan 9 - Tan 27+ 1/ Tan9- 1/tan 27
Sin 18•( cos 36/sin9•sin26•cos9•cos27)
= 4•Sin18•cos 36 / sin 18 Sin 54
= 4

[Bts_shorts_video]

From rhe class notes of tarun khandewal sir
Unhone same question karvaya hai in arjuna 1.0 when he tought us formulas of sin18 and cos36

[prabhagupta]

I solved it half because I am in 10th and didn't knew the value of sin18° and cos36°

[raghvendraupadhyay]

Sir I am in 10th and I could only do till 1/cos9sin9-1/cos27sin27. I didn't know the 2 sinAcosA= 2 sinA . and I did not know the value of sin 18 and cos36 value. But the videos are always soothing.

[kshitijjha]

Sir different and easy approch found 😅

[learneasilywithsam]

Sir, please please black screen hi use karo.

[MathematicianR]

sir please ek question solve kar dijiye (√2)^2^x=x^2^(√2)

[tanishqgoyal]

pls koi bhannat Maths jesa channel bta do, is channel ki lagbagh sabhi videos dekh Chuka hu esa hi aur jehar chahiye

[MrA]

Sir hum tan 81 aur tan9 ko add aur- tan63 aur- tan27 ko add nhi kar sakte aur kyu nhi kar sakte

[Shivam_]

I remembered the solution you have given in live lecture sir 😅

[bhabanisarmah]

Sir ap kaha prhate ho ?? Apka batch kaha se milega ??

[swap]

Sir reciprocal kaise kiya kuch samajh nahi aya, 10th

[Ayushkr]

lecture bna dijiye circles pe please sir

[neetusaini]

Sir aap htet pgt ke liye batch start kro na aapse pdh kr kisi se pdhne ka mn nhi krta

[manibhushankumar]

Sir AOD lecture 14 nahi mil raha hai😢😢😢😢😢😢

[Cherry]

Sir Eska Answer Eesa Nai Ho Sakta Kya?😅

tan 9° - tan 27° - tan 63° + tan 81°

=> tan 9° + tan 81° - tan 27° - tan 63°

tan 90° - tan 90° = 0

[riddhivyas]

Sir if options are far away we can do tan0-tan30-tan60-tan90